A BORG designer suggested me to add a thinner spacer at front reducer assembly to minimize the field of the curvature. This a bit widens the separation of two reducer assemblies. Spacing looks working to me. So I decided to carry these packages. Also I encourage BORG users who own both 90FL and 7704 to try out. A large and thinner spacer at front reducer and, a smaller and thicker spacer at the rear. This should be mostly optimized for 90FL and 7704. This should be the fun scope. I’m not a strong image stretching person. So I should be able to work with the illumination issue. I’m looking forward to using this system next weekend.